Attachment for rubber-goods-trimming machines



April 7, 1931. H. B. NORCROSS 1,799,386

I ATTACHMENT FOR RUBBER GOODS TRIMMING MACHINES Filed Nov. 11, 1929 HERBERT 1B.- NOBQBQSS, newc mer .esl t eppears heie tr mming, I

; igu efi s swsi pe spe tive a pa t 01 I Patented Apr. 7, 1931 vMesseesi srrs Amusement en enssseeePs-ssirrme Application filed November 1 This invention relates to a trimming'machine adapted to trim from molded rubber articles, such'as rubber heels and soles for footwear, finsleft on said articles by the molding operation, the machine including a pair of cooperating disk knives, a workssupe porting table on which work to be-trimme. is supported, while being moved .onthe table by the operator, to cause the removal, by the knives, of a fin projecting from a molded edge portion of the work, and an arcuate housing located adjacent the table: and partly surrounding one of the knives.

A maohine'characterized as above stated, is di'sclosed by Letters Patent to WVi'l'ls, trim.- ming machine forrubber goods, No. 1,577,- 5,' datedMarch 23,1926, the. hereinafter described attachment in which my invention is embodied 'being applicable to said machine, although not limited to'use with a machine organized in allrespects 'as shown by said patent.

The objectof the invention is to provide an attachment for amachine of the type referred to whereby liability molded edge portion ot the work by the knives is practically eliminated, the operator is protected against liability of injury by contact of a hand with the knives, and other desirable results are obtained. I Of the accompanying drawings forming a part of this specificatioike V 1 'Figure 1 is a front elevationpf a rubber gens r mm ng Inee ine pr ided th en 'eties inentembedyine he inventi n, H

' Figi efiis ssidev ew o the sein a. 'Fi'gurBi en enlargementei e pernen o e eil'ith 'ts lebe ng, she n in se ion.

igure A isi an she i "by F ure edge WQW of the Pertien certain ra ro s" be ng she-yin in seetion,

, igure 5 se ecti n e lim 19 f Fige .3, and show is r ibber heel partly trir nmedy U F gurefi s a p a Vi s 1 Figure. 7 an edge, yiew of rubber heel and lihlns hine sh wnhy Figure l; 2; 3

"trimming 1 molded of injury to the embodiedwomprisesa 1, 1929. Serial ire-496,336.

and the attachment embod ing my tion carried by s-aid'part- The same reference characters indicate the same parts in allot the figures.

12 and'13 designate thedisk knives .efii a adapted to trim from the f a rubber artiele 14., $1161} as a molded rubber-heel or cush on ng ii -it, he fins 1.5 whi h projeet from seid'edge fe s w en the e ieie mold in which it is formed; The article wi h its afins is he einafter te med th Work- .16 des gnatesthe t l-h e en Whieh he Wor is supported and moved by the operator ing the rimming eperat-ien.

1:7 des g at s er nnte hous ng. which is a fixed par ef th maeh ne and partly Si l: roun s theouter e upper knif 1:2-

The general organization of the machine, nc ndi he means ie rotating the kniv s n the ii-reetions indiss ed by the arrows" e, w F-ignrew maybe as shew-n Thy the d Wills patent, tervhieh l edge face .0

ebove menhone refer as anexemple; I The operator moves as to cause theaeting pordes gnated by 112a nd 3a the finslfi mm the edge faces of the WQI'k. When the work-has two fins, as shown by Erigune :7, the fins are trimmed eff by we operations. as usual. Fig.- re 5 shows a heel f om which one fin, and a port-ionof the other, have been removed in the usual way.- a v f r,

The attachment in which my invention is holder 19, fixed to an end'portion of the housing 17; and la '-Wnrkguiding abutment engagediwi-th the holder nd in uding a erminal adapted to have a 1,6, in manner t e s e h kni es, 1n F gureg, totrim Work adj cent a fin l p oject ng -th retron1 is em ved em the The helde tlr preferab y oblong, arena seened at onelend the heusing 1 :by

"clamping erew --,2,0, engaged wi h a tapped fic in th honsing and having a head 2 adapt d to c amp the holder against a flat s at 0 the hensing, as b s shown by Figure (l. s The guid ng abu m nt incl des al screw.-

ihresded stud e hedyv 22,.engaged with a to adapt the machine 'the holder.

the removal of a fin 15 fromthe work by the knives. The spacing of the terminal 24 from the acting portions of the knives is such that the terminal prevents the knives from cutting the previously molded edge face of the work, thus eliminating liability of the cutting or nickingof said edge face by the knives, which would exist if the abutment terminal were notemployed, the spoiling of heels and the consequent waste being therefore elminated. Said terminal also acts to protectthe operators hand or hands manipulating the work, by preventing a member or members of the hand from accidentally contacting with the acting portions of the ives.

The pivotal connection of the holder 19 with the housing 17, by the headed screw 20, enables the abutment to be adjustedtoward and from the acting portions of the knives, to operate on heels of different sizes, the holder being positively secured in any adjusted position by the head 21 of the clamping screw.

The abutment is adjustable endwise by rotating it in the tapped orifice 23 of the holder, and may be positively secured at any desired adjustment'by a jam nut 26, engaged with the threaded body 22, and setup against The screw 20 passes through a longitudinal slot 27 (Figure 3) in the holder, so that the latter is adjustable endwise to additionally vary the position of the abutment.

The anti-frictional terminal 24, in rolling contact with themolded edge face of the work, enables the operator to move said face with a minimum of frictional resistance while pressingit against the terminal.

The acting portions 12a and 13a of the knives fornia V'-shapedrecess, the apex of which is spaced from the abutment terminal 24, as shown by Figure 3. The acting portion 12a is therefore necessarily exposed between the terminal and the apex of the recess, so that thereis some liability of contact between a member'of the operators hand and the portion 12a,althoughsuch liability is less than it would be without the abutment which pro .tect's the operator to a considerable extent.

To additionally protect the operator, vide as an element of my attachment, a 30 having a shank portion attached by 31 to the housing 17, and a free end which is tapered to a thin endand I profinger screws portion projects between the terminal 24 and the knife edge portion 12a, and prevents the possibility which would otherwise exist of accidental contact of a member of the operators hand with the portion 12a. The tongue 30 is made of metal, and its tapered portion is preferably resilient.

The housing 17 in the machine of the abovementioned Wills patent, is provided with an oil duct 34, admitting oil to the upper portion of the cutting edge of the knife 12. Some of the oil flows downward along the tongue 30, and drops therefrom on to the portion of a fin 15, which is being severed by the knives, so that the lubricating oil is desirably distributed.

I have modified the housing 17' by forming thereon an ofiset seat 32, for the holder 19, and an inset seat 33, for the tongue 30, as best shown by Figure 8. Said seats are arranged to locate the holder and the abutment and the tongue 30 in their properoperative positions. My attachment may, there fore, be installed in a machine organized as shown, by substituting the modified housing 17 for one not provided with the attachment.

I claim: I i o 1. In a trimming machine which includes a pair of cooperating disk knives, a work-supporting table on which work to be trimmed is supported while being moved on the table by an operator, to cause the removal by the knives of a fin projecting from'a molded edge portionof the work, and an arcuate housing located adjacent the table and partly surrounding one of. the knives, an attachment associated with said housing and table and comprising a holder fixed'to an end portion of the housing, a work-guiding abutment cngaged with said holder and including a terminal adapted to have a limited bearing on said work edge portion adjacent a fin projecting therefrom, and to permit movement of the Work on the table by the operator, to cause the removal of a fin by the knives, the abutment terminal being arranged to prevent the knives from cutting. said edge portion, and to protect the operator. r

2. An attachment as specified by claim 1, the said abutment including a body portion engaged with the holder, and an anti-fricttional terminal portion adapted to have a rolling contact with said work edge portion. 3. An attachment as specified by claim 1, the abutment holder being pivotally connected with the housing by a clamping boltpermitting a swinging adjustment of the holder and abutment, and adapted to positively secure the holder in any adjusted position.

4. An attachment as specified by claim 1, the said abutment including a screw-threaded body portion engaged with a tapped orifice in the holder and longitudinally adjustable by rotation, and a terminal portion adapted to have a limited bearing on said signature.

work edge portion therefrom, means being provided for positively securing the body portion in any position to which it may be adjusted in the holder.

5. In a trimming machine which includes a pair of cooperating disk knives, a work-supporting table on which work to be trimmed is 7 supported while being moved on the table by an operator, to cause the removal by the knives of a fin projecting from a molded edge portion of the'work, and an arcuate housing locatedadjacent the table and partly surrounding one ofthe knives, an attachment associated with said housing and table and comprising a holder of the housing, a work-guiding abutment engaged with said holder and including a terminal adapted to have a limited bearing on said work edge portion adjacent a fin projecting therefrom, and to permit movement of the work on the table by the operator, to cause the removal of a fin by the knives, the abutment terminal being arranged to prevent, the knives from cutting said edge portion, and to protect the operator, said attachment comprising also a flexible tongue fixed at one one end to the housing and having a free end interposed between the abutment terminal and the acting portions of the knives.

6. In a trimming machine of the character stated, an arcuate an inset seat in the opposite side, an abutment holder secured upon the oifset seat and provided with a guiding abutment, and a tongue secured upon the inset seat and having a free end located beside the abutment.

In testimony whereof I have aflixed my I HERBERT B. NORCROSS.

adjacent a fin projecting fixed to an end portion,

housing partly surrounding a disk knife, and provided with an off set seat at one side, 

